The TRN is necessary for all transactions with public services such as filing income tax return at the Tax Agency or for any other activity relevant with taxes, such as getting employed or self-employed, for renting or buying a house or a car etc. You might also need it for Bank transactions or for transactions with other service providers.

You need to visit the Tax Agency of your residence. You can either show up in person or someone else on your behalf as long as he/she has a written authorization attested by the authentication of your signature. This declaration can be filled out at a Citizen Service Center or a Police Station.

You may be asked to provide the postcode of your residence as well as a telephone communication number. Also, please note that you should provide the above details while filling in the M1 form at the tax office during the Tax Registration Number process.

You can contact the Hellenic Post Offices. If you live in an apartment you can get it either from the lessor or the NGO which let the apartment on your behalf. If you are staying at a hotel you can ask a hotel employee. If you reside at a camp you can ask the camp manager or a member of an NGO operating within the camp.